ID   PURK_CORAM              Reviewed;         413 AA.
AC   Q44678;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   03-AUG-2022, entry version 96.
DE   RecName: Full=N5-carboxyaminoimidazole ribonucleotide synthase {ECO:0000255|HAMAP-Rule:MF_01928};
DE            Short=N5-CAIR synthase {ECO:0000255|HAMAP-Rule:MF_01928};
DE            EC=6.3.4.18 {ECO:0000255|HAMAP-Rule:MF_01928};
DE   AltName: Full=5-(carboxyamino)imidazole ribonucleotide synthetase {ECO:0000255|HAMAP-Rule:MF_01928};
GN   Name=purK {ECO:0000255|HAMAP-Rule:MF_01928};
OS   Corynebacterium ammoniagenes (Brevibacterium ammoniagenes).
OC   Bacteria; Actinobacteria; Corynebacteriales; Corynebacteriaceae;
OC   Corynebacterium.
OX   NCBI_TaxID=1697;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=ATCC 6872 / DSM 20305 / IAM 1645 / KCTC 1019 / NCTC 2399;
RX   PubMed=8998996; DOI=10.1111/j.1574-6968.1996.tb08116.x;
RA   Chung S.O., Lee J.H., Lee S.Y., Lee D.S.;
RT   "Genomic organization of purK and purE in Brevibacterium ammoniagenes ATCC
RT   6872: purE locus provides a clue for genomic evolution.";
RL   FEMS Microbiol. Lett. 137:265-268(1996).
CC   -!- FUNCTION: Catalyzes the ATP-dependent conversion of 5-aminoimidazole
CC       ribonucleotide (AIR) and HCO(3)(-) to N5-carboxyaminoimidazole
CC       ribonucleotide (N5-CAIR). {ECO:0000255|HAMAP-Rule:MF_01928}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=5-amino-1-(5-phospho-beta-D-ribosyl)imidazole + ATP +
CC         hydrogencarbonate = 5-carboxyamino-1-(5-phospho-D-ribosyl)imidazole +
CC         ADP + 2 H(+) + phosphate; Xref=Rhea:RHEA:19317, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:17544, ChEBI:CHEBI:30616, ChEBI:CHEBI:43474,
CC         ChEBI:CHEBI:58730, ChEBI:CHEBI:137981, ChEBI:CHEBI:456216;
CC         EC=6.3.4.18; Evidence={ECO:0000255|HAMAP-Rule:MF_01928};
CC   -!- PATHWAY: Purine metabolism; IMP biosynthesis via de novo pathway; 5-
CC       amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate from 5-amino-1-(5-
CC       phospho-D-ribosyl)imidazole (N5-CAIR route): step 1/2.
CC       {ECO:0000255|HAMAP-Rule:MF_01928}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01928}.
CC   -!- SIMILARITY: Belongs to the PurK/PurT family. {ECO:0000255|HAMAP-
CC       Rule:MF_01928}.
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DR   EMBL; X91189; CAA62598.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q44678; -.
DR   SMR; Q44678; -.
DR   UniPathway; UPA00074; UER00942.
DR   GO; GO:0034028; F:5-(carboxyamino)imidazole ribonucleotide synthase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR   GO; GO:0046872; F:metal ion binding; IEA:InterPro.
DR   GO; GO:0004638; F:phosphoribosylaminoimidazole carboxylase activity; IEA:InterPro.
DR   GO; GO:0006189; P:'de novo' IMP biosynthetic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.30.1490.20; -; 1.
DR   HAMAP; MF_01928; PurK; 1.
DR   InterPro; IPR011761; ATP-grasp.
DR   InterPro; IPR003135; ATP-grasp_carboxylate-amine.
DR   InterPro; IPR013815; ATP_grasp_subdomain_1.
DR   InterPro; IPR016185; PreATP-grasp_dom_sf.
DR   InterPro; IPR005875; PurK.
DR   InterPro; IPR040686; PurK_C.
DR   InterPro; IPR011054; Rudment_hybrid_motif.
DR   Pfam; PF02222; ATP-grasp; 1.
DR   Pfam; PF17769; PurK_C; 1.
DR   SUPFAM; SSF51246; SSF51246; 1.
DR   SUPFAM; SSF52440; SSF52440; 1.
DR   TIGRFAMs; TIGR01161; purK; 1.
DR   PROSITE; PS50975; ATP_GRASP; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Ligase; Nucleotide-binding; Purine biosynthesis.
FT   CHAIN           1..413
FT                   /note="N5-carboxyaminoimidazole ribonucleotide synthase"
FT                   /id="PRO_0000074996"
FT   DOMAIN          126..319
FT                   /note="ATP-grasp"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01928"
FT   REGION          1..21
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   BINDING         122
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01928"
FT   BINDING         162
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01928"
FT   BINDING         199..202
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01928"
FT   BINDING         207
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01928"
FT   BINDING         289..290
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01928"
SQ   SEQUENCE   413 AA;  44111 MW;  F738B230DF5D119A CRC64;
     MKRVSEQAGN PDGNPQAHVP GMPVIAVIGD GQLARMMQTA AIELGQSLRL LAGARDASAA
     QVCADVVLGD YTNYDDLLKA VDGATAVTFD HEHVPNEHLT ALIDAGYNDQ PQPAALINAQ
     DKLVMRERLA ELGAPVPRFA PIESAQDAYD FWTLTSGQVC LKARRGGYDG KGVWFPNNES
     ELTALVSDLS RRGVALMAEE KVGWSRELSV LVARTPSGEV ATWPLTESVQ RNGVCAEAVA
     PAPGVDPQLQ QRAETLGEKI ATELGVTGVL AVELFAFANE SGAEDIAVNE LAMRPHNTGH
     WTLVGSVTSQ FEQHLRAVMD EPLGDTSTLA PVTVMANVLG ADEDQRCQWA SVPRSGAPVP
     ATKVHLYGKG IAQGRKIGHV NLTGEDEEAT RRDARLAADF LVNAAWSDNW SAK